Docs: Automatically build / update decompile line count on documentation site (#650)

* prep work for next step

* better formatting on latest updates

* test

* fix mistakes

.github/workflows/scripts/line-count.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+LINE_COUNT=$(find ./goal_src -name '*.gc' | xargs wc -l | tail -1 | awk -F'[^0-9]+' '{ print $2 }')
+
+sed -i "s/.*value.*/      \"value\": ${LINE_COUNT},/g" ./docs/gh-pages-proj/src/config/progress.json